Automatically threading loom shuttle



AUTOMATICALLY THREADING LOOM SHUTTLE Fi1edAug.28, 1928 llllllllllllm I III //V|/ENTOR.' Y

WVMQ ATTORNEY Patented May 28, 1929.

UNITED STATES arise.

HARRY A. DAVIS, 01? HOPEDALE, MASSACHUSETTS, ASSIGNOR 'IO DR APER CORPORA- TION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

AUTOMATICALLY THEEADlNG LOOIVI SHUTTLE.

Application filed August 28, 1928. Serial No. 302,557.

This invention relates to automatically threading loom shuttles and is more particularly directed to the means for imparting tension to the thread during weaving.

In that type of filling replenishing looms wherein the filling is replenished by the insertion of a filling carrier in the shuttle from time to time, the shuttle becomes partially threaded on the first pick following replenishment and on the return pick of the shuttle to the replenishing side of the loom it is completely threaded. Shuttles of this general type are usually provided with some character of tension means to apply tension to the thread during weaving, that it may be laid straight in the shed In weaving with some kinds or characters of filling, however, it is desirable to have the weaving tension placed upon the thread during the first pick of the shuttle following replenishment, otherwise imperfect cloth is liable to result. This is particularly observable where the filling is of silk, artificial silk, rayon and the like, and failure to provide proper tension to such thread on the first pick of the shuttle following replenishment results in the formation of what is known as shiners.

One of the important, objects of the present invention is to provide an automatically threading loom shuttle with a tension device which will take control of the thread on the first pick following replenishment and impart thereto the subsequent weaving tension. In accordance with the present invention, the shuttle is provided with a longitudinally extended thread passage and side delivery eye, and arranged in the thread passage is a tension device which takes control of the thread on the first pickfollowing replenishment and exerts thereupon the same tension that is imparted to the thread during subse quent weaving.

' More specifically stated, the present invention comprises a series of pins extending across the thread passage in separated relation and a second series of tensioning members in staggered-relation to the pins and extending part way across the thread passage, so that on the first pick of the shuttle following replenishment the thread passing longitudinally of the thread passage is deflected into a series of vertical bights and the tension imparted to the thread remains substantially during subsequentweavinm To insure that the tensioning device shall take control of the thread on the first pick following replenishment, one set of tensioning members or pins is provided with deflected portions which act upon the swirling thread to direct it between the tensioning members and pins.

The invention and novel features thereof will best be made clear from the following description and the accompanying drawings of one good form thereof.

In the drawings:

Fig. 1 is a perspective view of the thread- 1ng end of an automatically threading shuttle containing the present invention;

Flg. 2 is a perspective view of the threading block removed from the shuttle and provided with the present invention;

Fig. 3 is an interior perspective of the threading block containing the present invention, one of the side walls ofthe threading block being omitted; and V Fig. 4C is an end view of the threading block containing the present invention, with one of the side walls ofiset.

The shuttle 1 contains the bobbin chamber 2 and is provided with a longitudinally extending thread passage 3 which communicates with the side dellvery eye 4, in which respects the shuttle may be of the usual fillsupporting pins 6 transversely of the thread passage, the block itself may be in two parts, one of which, as 7, may constitute the main portion of the threading block, and the other member 8 of which has complemental portions for forming the longitudinal thread passage, and provided in the portion '8 of the threading, block are a series of sockets 9 into which the end portions of the thread supporting pins 6 may extend when the parts of the threading block are in their assembled relation, as indicated in- Fig, 21 As a iturtnermeaas of guiding the ewe pertiens of the threading block into their assembled relation, a positioning pin or pins 10 may be employed to enter a socket or sockets 11 in the opposite part of the block, and each portion of the threading block is provided with an opening through which the usual crossbolt may extend for holding the parts in their assembled relation in the shuttle.

Extending from one wall of the longitudinal thread passage are a series of tension ing members 12 which extend part way across the thread passage towards the opposite .vall thereof In the present instance of the id vention, the tensioning members 12 may be formed as pins, each having a return bend, and angularly arranged, as indicated. he upwardly extending legs 13 of the tensioning members or pins 12 are preferably inclined with relation to the opposed legs 14:, and the ends of the tensioning members 12 are seated in the wall at one side of the longitudinal thread passage, with the result that the swirling thread, on the first pick following replenishment, is directed between the thread sup porting pins and tensioning members 12, thereby exert tension on the thread on the first pick of the shuttle.

The threading block, as herein shown, is provided at one side and at the entrance of the thread passage with a thread guide 15, having a laterally and downwardly curved surface 16 and a thread bearing portion 17, which may preferably be positioned below the horizontal plane passed through the! thread supporting pins 6, the construction being such that the'combined effect of the thread guide 15 and the upper leg portions of the tensioning members 12 is to position the swirling thread between the thread supporting pins 6 and the tensioning members on the first pick of theshuttle following replenishment.

Adjacent the exit end of the thread passage the threading block is provided with a horn 18 under the arched surface 19 of which the thread leads to the side delivery eye, and interposed between the horn 18 and the thread tensioning device, the threading block is shown in the present instance of the invention as provided with a post or roller 20 around which the thread passes on its way to the side delivery eye. The post or roller 20 may be formed of vitreous material, since the entire tension which is desired for the thread may be exerted thereon by the deflecting influence of the thread supporting pins 6 and the tensioning members 12, which by their overlapping, staggered relation form vertical bights in the thread in the longitudinal thread passage. i

The angular relation of the legs 14 of the tensioning members 12 with the thread supporting pins .6 is such that the thread a may readily enter between the pins and tensioning members and be retained therein by the thread guides at the entrance and exist ends of the thread passage.

From the construction described it will be noted that the thread tensioning device consists of horizonta ly fixed thread supportmaintained with substantially unvarying effeet during subsequent weaving.

hat is claimed is: I V

1. An automatically threading loom shuttle having a longit ,dinally extending thread passage and a side delivery eye, and a thread tensioning device in the thread passage, comprising a first series of pins crossing the thread iassage in separated relation, and a second series of pins extending part way across the thread passage in staggered relation to the first series of pins and having return bends for directing the thread between the two series of pinsto form a series of vertical bights in the thread.

2. An automatically threading loom shuttle having a longitudinally extending thread passage and a side delivery eye, a series of fixed horizontal pins extending transversely across the thread passage in separated relation and forming horizontal. supports for the thread in the thread passage, a series of fixed pins extending from one wall of the thread passage part way across the passage to a point adjacent the opposite wall in staggered relation to the horizontal pins and provided with inclined thread directing portions which guide the thread onto the series of horizontal pins and between the two series of pins to form vertical bights in the thread.

8. An automatically threading loom shut tle having a longitudinally extending thread passage and a side delivery eye, and a thread tensioning device in the thread passage, comprising a series of horizontally mounted pins crossing the thread passage in separated relation, a series of pins extending from onewall of the thread passage in staggered relation with the horizontal pins and having upwardly deflected portions adjacent the opposite wall of the thread passage which act to direct the thread between the two series of pins on the first pick of the shuttle following replenishment.

4. An automatically threading loom shuttle having a longitudinally extending thread passage and a side delivery eye, a series of thread supporting pins crossing the thread passage in separated relation and on which the thread is supported during weaving, a series of pins having two leg portions extending from one wall of and part way across the thread passage and arranged in staggered relation with the supporting pins to form a series of vertical tensionin'g bights in the thread passing between the pins.

5. An automatically threading loom shuttle having a longitudinally extending thread passage and a side delivery eye, a series of thread supporting pins crossing the thread passage in separated relation and on which the thread is supported during weaving, a series of pins having two leg portions extending from one wall of and part way across the thread passage and arranged in staggered relation with the supporting pins to form a series of vertical tensioning bights in the thread passing between the pins, and a thread guide at the entrance of the thread ,)assage to direct the swirling thread for engagement by the tensioning pins.

6. An automatically threading loom shutt-le having a side delivery eye, a threading block having a longitudinally extending thread passage, a series of horizontal thread supporting pins crossing the thread passage in separated relation, a series of cooperating tensioning members arranged in staggered relation with the horizontal pins and having two leg portions arranged at an angle to each other and extending part way across thethread passage to direct the swirling thread between the pins and tensioning members on the lirstpick of the shuttle following replenishinent.

7.: An automatically threading loom shuttle having a side delivery eye, a two part threading block having a longitudinally extending thread passage, a series of horizontal thread supporting pins crossing the thread passage in separated relation, a series of cooperating tensioning members arranged in staggered relation with the horizontal pins and having two leg portions arranged at an. angle to each other and extending part way across the thread passage to direct the swirling thread between the pins and tensioning members on the first pick of the shuttle following replenishment.

In testimony whereof, I have signed my name to this specification.

HARRY A. DAVIS. 

